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Search: authors:"Hamid Shabani"

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Bouncing cosmological solutions from \(f(\mathsf{R,T})\) gravity

Eur. Phys. J. C Bouncing cosmological solutions from f (R, T) gravity Hamid Shabani 1 Amir Hadi Ziaie 0 0 Department of Physics, Kahnooj Branch, Islamic Azad University , Kerman , Iran 1 Physics

Late-time cosmological evolution of a general class of \(f(\mathsf{R},\mathsf{T})\) gravity with minimal curvature-matter coupling

In this work, we study the late-time cosmological solutions of \(f(\mathsf{R},\mathsf{T})=g(\mathsf{R})+h(-\mathsf{T})\) models assuming that the conservation of the energy-momentum tensor (EMT) is violated. We perform our analysis through constructing an autonomous dynamical system for the equations of motion. We study the stability properties of solutions via considering linear...

Consequences of energy conservation violation: late time solutions of \(\Lambda (\mathsf{T}) \mathsf{CDM}\) subclass of \(f(\mathsf{R},\mathsf{T})\) gravity using dynamical system approach

Very recently, Josset and Perez (Phys. Rev. Lett. 118:021102, 2017) have shown that a violation of the energy-momentum tensor (EMT) could result in an accelerated expansion state via the appearance of an effective cosmological constant, in the context of unimodular gravity. Inspired by this outcome, in this paper we investigate cosmological consequences of a violation of the EMT...

Stability of the Einstein static universe in f(R, T) gravity

The Einstein static (ES) universe has played a major role in various emergent scenarios recently proposed in order to cure the problem of the initial singularity of the standard model of cosmology. In the model we address, we study the existence and stability of an ES universe in the context of f(R, T) modified theories of gravity. Considering specific forms of the f(R, T...